¹ Source: wiktionary.com
Medical Definition of Colourimeter
1. A device used to find out the concentration of particles suspended in a solution or a liquid medium by beaming light through it and measuring the amount of light that makes it out the other side. (The process is a part of the study of spectroscopy.) The device can be used to measure turbidity, or the amount of bacterial cells in a medium. The method of colourimetry is based on the Beer-Lambert Law. (09 Oct 1997)